diff --git a/hardware/README.md b/hardware/README.md
index e54ead3..e0478d0 100644
--- a/hardware/README.md
+++ b/hardware/README.md
@@ -108,6 +108,6 @@ The ESP8266 and GoPro talk over Wi-Fi — **no data cable between them**. The on
 | Case body external | ~56.8 × 36.6 × 19.0 |
 | Lid external | ~56.8 × 32.8 × 4.0 |
 | Tripod clamp | ~43.0 × 53.5 × 16.0 |
-| Clamp-to-case mount | Two M3 screws through flat mounting plate |
+| Clamp-to-case mount | Two side-by-side M3 screws through flat mounting plate |
 | Clamp pole fit | Nominal 35mm; smaller poles TBD / may need inserts |
 | Total weight | TBD after prototype print |
diff --git a/hardware/case/case-body-v3.stl b/hardware/case/case-body-v3.stl
index 0179787..f1a63d3 100644
Binary files a/hardware/case/case-body-v3.stl and b/hardware/case/case-body-v3.stl differ
diff --git a/hardware/case/full-case-preview-v3.stl b/hardware/case/full-case-preview-v3.stl
index 59642f5..35ac9a3 100644
Binary files a/hardware/case/full-case-preview-v3.stl and b/hardware/case/full-case-preview-v3.stl differ
diff --git a/hardware/case/tripod-case-v3.scad b/hardware/case/tripod-case-v3.scad
index 12ed146..87dc787 100644
--- a/hardware/case/tripod-case-v3.scad
+++ b/hardware/case/tripod-case-v3.scad
@@ -1,5 +1,5 @@
 // RemoteRig — Dual-ESP Tripod Case v3
-// v3b changes: screw-tightened tripod clamp + two-screw flat mounting plate interface.
+// v3c changes: screw-tightened tripod clamp + horizontal two-screw flat mounting plate interface.
 // Coordinate system: all case/lid geometry uses bottom-origin Z.
 
 $fn = 36;
@@ -35,9 +35,9 @@ nut_flat      = 6.4;      // M3 nut trap flat-to-flat
 mount_plate_w      = 24.0;
 mount_plate_h      = 16.0;
 mount_plate_thick  = 4.0;
-mount_hole_spacing = 10.0;
-mount_screw_clear  = 3.4;  // M3 clearance through clamp plate
-mount_case_pilot   = 2.7;  // pilot/insert hole through case boss
+mount_hole_spacing = 14.0;  // side-by-side M3 case-mount screws
+mount_screw_clear  = 3.4;   // M3 clearance through clamp plate
+mount_case_pilot   = 2.7;   // pilot/insert hole through case boss
 mount_boss_r       = 1.2;
 
 // Cable ports
@@ -116,8 +116,8 @@ module case_mount_boss() {
         translate([0, boss_y, outer_h/2])
             rounded_cube_centered(mount_plate_w, mount_plate_thick, mount_plate_h, mount_boss_r);
 
-        for (zoff = [-mount_hole_spacing/2, mount_hole_spacing/2]) {
-            translate([0, outer_d/2 + mount_plate_thick/2, outer_h/2 + zoff])
+        for (xoff = [-mount_hole_spacing/2, mount_hole_spacing/2]) {
+            translate([xoff, outer_d/2 + mount_plate_thick/2, outer_h/2])
                 rotate([90, 0, 0])
                     cylinder(d=mount_case_pilot, h=mount_plate_thick + wall*3, center=true, $fn=24);
         }
@@ -190,8 +190,8 @@ module clamp_mount_plate() {
         translate([0, plate_y, 0])
             rounded_cube_centered(mount_plate_w, mount_plate_thick, mount_plate_h, mount_boss_r);
 
-        for (zoff = [-mount_hole_spacing/2, mount_hole_spacing/2]) {
-            translate([0, plate_y, zoff])
+        for (xoff = [-mount_hole_spacing/2, mount_hole_spacing/2]) {
+            translate([xoff, plate_y, 0])
                 rotate([90, 0, 0])
                     cylinder(d=mount_screw_clear, h=mount_plate_thick + 2, center=true, $fn=24);
         }
diff --git a/hardware/case/tripod-clamp-v3.stl b/hardware/case/tripod-clamp-v3.stl
index c0377fd..5e847a5 100644
Binary files a/hardware/case/tripod-clamp-v3.stl and b/hardware/case/tripod-clamp-v3.stl differ